Question

What is the area of the sector of a circle of radius 21 cm and central angle 60°? (Take π = 22/7)
1. 331 cm²
2. 231 cm²
3. 321 cm²
4. 154 cm²

Answer 1

Correct Answer - Option 2 : 231 cm²

Given:

Radius of sector (r) = 21 cm

Central angle (θ) = 60° 

Formula Used:

Area of sector = πr2 × (θ/360)

Calculation:

Area of sector = (22/7) × 21 × 21 × (60°/360°)

⇒ Area of sector = 231 cm2

∴ Required area of the sector is 231 cm2